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Scientists have explained why it is impossible to create a time machine

May 26 2005
10:21

Prospective travelers who will benefit from a short path to be on the other side of the universe may have to choose between a dangerous and unpredictable while traveling through space-time, say a new study.

This study puts an end to a time machine, but it suggests that the Universe will live up to its age, not to burst into pieces because of some wicked dark energy.

Fans of science fiction know that the "wormhole" to help cut a path through space and time, sucking in objects at one end and spitting them on the other side. Since the distance from one point to another much shorter than conventional travel across the universe.

To better understand the phenomenon of the wormhole, one can imagine a piece of paper (it will represent the universe), which should be folded neatly in half. Then at the very large distance from the fold, the paper should be punctured with a needle. This creates a "wormhole" connecting two distant points in the universe.

But for this trick to work in space-time, a hypothetical tunnel must be an unknown form of matter. This "exotic" matter exerts a negative pressure

- If anything like that filled the balloon, it would deflate.

Now physicists Roman Buniy and Stephen Hsu of the University of Oregon in the U.S. studied the properties of such matter in two theoretical wormhole types. The first type is generally governed by the laws of classical physics and does not fluctuate over time, while the second follows the rules of quantum mechanics, and thus inherits its unpredictability.

This unpredictability means that there is no guarantee that by using quantum wormhole, one can prove a certain point of space-time. "The danger is that the end of the wormhole, which varies in time, may be in a wall or at the bottom of the Pacific" - says Hsu.

"Or do you leave for the year before, as expected, or the year after that."

In this regard, scholars have suggested that the classical "wormholes" could more effectively serve as portals through time and space. However, recently published in the online source of the work of vibrations and Hsu show these classical objects are extremely unstable.

"It is a little push the apparatus as a system to fall apart - as bridge collapses - Hsu said in an interview with New Scientist. - Maybe she did not last long enough for you to get to the other side."

Thus, the wormhole travelers caught between Scylla and Charybdis - they will have to choose between reliability and (relative) safety for their mode of transportation, "says Hsu.

But the newly discovered instability actually has positive implications for the fate of the universe.

In this paper, wormholes, which varies in time, may be in a wall or at the bottom of the Pacific "- says Hsu.

"Or do you leave for the year before, as expected, or the year after that."

Therefore, scientists have assumed that the classical "wormholes" could more effectively serve as portals through time and space. However, recently published in the online source of the work of vibrations and Hsu show these classical objects are extremely unstable.

"It is a little push the apparatus as a system to fall apart - as bridge collapses - Hsu said in an interview with New Scientist. - Perhaps it is not last long enough for you to get to the other side. "

Thus, the wormhole travelers caught between Scylla and Charybdis - they will have to choose between reliability and (relative) safety for their mode of transportation, "says Hsu.

But the newly discovered instability actually has positive implications for the fate of the universe.

In this work, an assumption that a hypothetical matter, to fill the tunnels inside, has the same properties as the dark energy, accelerating expansion of the universe.

Scientists have proposed various possible values for this dark energy, but Hsu says that a new survey shows that most of these values - which is the acceleration - are unstable, reports New Scientist (translation Inopressa.Ru).

This suggests that the universe will not end with the "big rip" in which the increasing cosmic acceleration will lead to the fact that tear apart galaxies, stars and even atoms, says Hsu. "If dark energy has properties that can lead to a" big rip "it is likely to fall apart because of its instability long before we are anywhere near the division, "- he says.

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